Use github action as CI (#35)

Use github action as CI

.github/workflows/compile.yaml

@@ -0,0 +1,27 @@
+name: Compile
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        node-version: [12]
+
+    steps:
+      - uses: actions/checkout@v1
+        with:
+          submodules: true
+      - name: Setup node ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: npm ci and compile
+        run: |
+          npm ci
+          npm run compile
+        env:
+          CI: true

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "server"]
 	path = server
-	url = git@github.com:elm-tooling/elm-language-server.git
+	url = https://github.com/elm-tooling/elm-language-server.git

azure-pipelines.yml

@@ -1,71 +0,0 @@
-jobs:
-  - job: Windows
-    pool:
-      name: Hosted VS2017
-      demands: npm
-    steps:
-      - task: NodeTool@0
-        displayName: "Use Node 12.x"
-        inputs:
-          versionSpec: 12.x
-      - task: Npm@1
-        displayName: "Install dependencies"
-        inputs:
-          verbose: false
-      - task: Npm@1
-        displayName: "Compile sources"
-        inputs:
-          command: custom
-          verbose: false
-          customCommand: "run compile"
-      # - script: "node node_modules/vscode/bin/test"
-      #   displayName: "Run tests"
-  - job: macOS
-    pool:
-      name: Hosted macOS
-      demands: npm
-    steps:
-      - task: NodeTool@0
-        displayName: "Use Node 12.x"
-        inputs:
-          versionSpec: 12.x
-      - task: Npm@1
-        displayName: "Install dependencies"
-        inputs:
-          verbose: false
-      - task: Npm@1
-        displayName: "Compile sources"
-        inputs:
-          command: custom
-          verbose: false
-          customCommand: "run compile"
-      # - script: "node node_modules/vscode/bin/test"
-      #   displayName: "Run tests"
-  - job: Linux
-    pool:
-      name: Hosted Ubuntu 1604
-      demands: npm
-    steps:
-      - task: NodeTool@0
-        displayName: "Use Node 12.x"
-        inputs:
-          versionSpec: 12.x
-      - task: Npm@1
-        displayName: "Install dependencies"
-        inputs:
-          verbose: false
-      - task: Npm@1
-        displayName: "Compile sources"
-        inputs:
-          command: custom
-          verbose: false
-          customCommand: "run compile"
-      - script: |
-          set -e
-          /usr/bin/Xvfb :10 -ac >> /tmp/Xvfb.out 2>&1 &
-          disown -ar
-        displayName: "Start xvfb"
-      # - script: "node node_modules/vscode/bin/test"
-      #   displayName: "Run tests"
-      #   env:
-      #     DISPLAY: :10